Home / 15,668.80-21,615.58-9,698.28

Finding the Fourth Proportional to 15,668.80, 21,615.58 and 9,698.28

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Solution

The fourth proportional to 15,668.80, 21,615.58 and 9,698.28 is: 13,379.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,668.80 : 21,615.58 = 9,698.28 : x
  2. Step 2: Convert to fraction form
    15,668.80/21,615.58 = 9,698.28/x
  3. Step 3: Cross multiply
    15,668.80x = 21,615.58 × 9,698.28
  4. Step 4: Simplify right side
    15,668.80x = 209,633,947.20
  5. Step 5: Solve for x
    x = 209,633,947.20/15,668.80
  6. Step 6: Final answer
    x = 13,379.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.